Skip to comments.Anyone recognize the electronics found inside the Boston bombs?
Posted on 04/17/2013 9:29:17 AM PDT by swamp40
Anyone recognize the electronics found inside the Boston bombs?
I design electronics for a living, so these boards caught my attention.
The green board has some round corner notches. (Those are to avoid the screw posts in a rectangular enclosure.)
While not exactly unusual, they ARE distinctive.
I'm guessing they are some kind of remote control electronics from a place like ebay, especially since the battery used:
probably came from ebay:
The green pcb looks similar, but not exactly like an E-flite Blade CP (RC helicopter)- so I'm guessing it's a different model from E-flite.
Google Image Search for Blade CP pcb
Can you enhance the 1st pic anymore? It’s too fuzzy to correctly make out many of the components on the PCB. As an electronics tech I am very interested in seeing the electonics package used.
I’ve been designing PCB’s since ‘99, and they all look alike to me. Tough to tell what they are without much better pictures.
The pics are here:
I’d expected to see no electronics that weren’t from a mobile phone, and that’s not mobile phone electronics. The circuit board is another level of complexity in an IED.
Interesting that a Tenergy CR123 battery is found. They’re rechargeable. They’re also not intended for use in LED flashlights that use circuitry because they have voltage spikes that can damage electronics.
No, I can’t enhance it easily - but it’s easy enough for me to see.
It’s just a couple 1206 surface mount resistors and a couple surface mount caps.
The two thru-hole caps on the bottom are a tantalum (yellow) and a large (blown-up) electrolytic - those are used to stabilize the power supply.
Not enough to figure out what it does.
Someone (probably an RC enthusiast) will recognize the exact board outlines.
The green one looks the the board from a Syma S107 rc helicopter. the other one looks the board from a WL v911 rc helicopter.
I think that’s the remains of a battery back - note the black cap, transparent sleeve and leads from this site -
Just as a point of interest, the Blade CP is older and I think originally had a 72 Mhz radio. These would be unacceptably (from the bomber’s point of view) susceptible to interference and accidental detonation. All more recent transmitter/receiver combinations would be 2.4 Ghz, including literally hundreds of Chinese variations with much more secure operation. DSM, DSMX, etc., and similar with sophisticated frequency hopping, spread spectrum protocols. Bundled transmitters have very short range but upgrading to a higher power radio is straightforward. A higher power controller could have been operated from a half mile away or more.
Yes, definitely higher resolution pic of the second one. Looks like there are some SMT tactile pushbuttons on it? Or they may be power transistor packages? Could be an RC model receiver of some make. The first pic looked like cheap massed produced toy electronics.
I see boring low-tech cheap RC or electronics hobbyist parts.
The trigger would be one of these:
Background checks for mall heli purchasers now!
Better be safe than sorry.
Yes, I agree 100%. Ebay sells them, as well.
Tenergy? Is that a common brand? Never heard of it myself.
One thing Muslims do before jihad is shave themselves completely. Are there tiny shaved-off hairs in the components
Looks like a rechargable battery from a RC pack, notice the curve plastic pieces by the battery, shrink wrap from a battery pack? Could be an RC receiver from some model.
Weird knock-off brand battery.
Probably only sold in the Middle East...
The range for that one would be inadequate unless you want to experience the blast first-hand.
Better convert to a Spectrum or something (at least 100 mW).
It is actually pretty common in rechargeable cells like for cordless home phones, camera batteries, or RC toys. If you cut those cells open, you’ll see groups of these batteries.
Someone else on the Daily Mail website stated it was a battery pack from a RC car or something like that.
Turnigy — slightly different spelling — is very common. Odd.
Wouldn’t take much to have an on-demand delay timer.
And the resistors have printing on them. It’s hard to tell, since there’s nothing for scale, but in my experience that makes them 0805 or 1206 sizes. 0603 or smaller just aren’t big enough.
The green piece with the jagged edge on top appears to fit with the jagged edge in the second photo, part of the same circuit board upside down. From the ruler, the whole intact board would appear to have been about 4 cm by 4 cm.
If it was cellphone det wouldn’t they just use a dispoasable cell phone with a headset wire plugged into board that if the voltage passed a certaint hreshold then it would trigger it. Then set a ringtone to be very loud for a certain number and silent for the default ring tone and set the loud ring tone for a payphone or another disposable phone to prevent accidental triggering...
However you could easily by an RC copter more anonymously than a disposable cell phone.....
600V AWM (Appliance Wiring Material) conductors, 14 AWG. The red one shows “Style 3135,” which is Heat-Resistant Silicone Cable. The long nomenclature is a traceability of sorts, to the insulating material.
Well, I’m pretty sure they are two different colors, which would mean two separate pcbs.
Green is by far the most common pcb color, but there are lots of blue ones as well.
CNN reporting suspect ‘clearly identified’...facial and seen placing package.....video from Lord and Taylor ....male, dark skinned.....
Umm, not sure where you got that “cell phone” photo, but it is obviously Photoshopped. It’s just a picture of a cell phone enclosure with a cropped image of a PC mother board overlaid on it. Unless, of course, there is a cell phone out there with PCI expansion slots inside and a big CPU heatsink.
cnn reporting authorities have a clear identification of suspect...photo from Lord and Taylor video....male, dark skinned...seen placing a package. Seems this is huge breakthrough.
Tenergy isn’t a typical “eBay” cheap-o battery. I have purchased them myself from a legit battery outfit.
But not saying it couldn’t come from eBay... just not one of the more typical brands from there
curmudgeons gonna curmudge
They appear to me to be related to those electronic cooking timers that you can get complete with battery at any housewares department in any 5&10 store, Wal-Mart, drug stores, etc....
standing by ... keep me updated please.
They probably want us to know they have the PCBs, but they don’t want to reveal what’s on them. They only want so much “help” from us guys.
I agree. FR is sleek and streamlined. I like it! :-)
Some boards have a different color on the solderside than on the component side.
The jagged edges seem to match well, perhaps this is a case of a board using different colors.
Early reports of “crude device” with the circuitry involved seem to me are dispelled and this was the work of more than some “lone wolf” even though it was locally fabricated.
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